Remove/Install Control Unit For Windshield Heater - AR54.21-P-0122SE

Model 223 

with code 597 (Heated windshield) 

with code ME10 (Hybrid vehicle (plug-in, PHEV)) 

Shown with code 83B (DC charging function) 

Fig 1: Control Unit For Windshield Heater Components Location - Model 223 With Code 597, ME10 (Shown With Code 83B)

Courtesy of MERCEDES-BENZ USA

	Risk of death  when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)	Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.	AS00.00-Z-0035-01A
Notice	General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment		AH00.00-Z-0300-01A
Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on safety-relevant components		AH00.00-Z-0019-01A
	Remove/install
1	Lift high-voltage battery module and secure with support.	Model 223 with engine 256 with code 597 (Heated windshield) with code ME10 (Hybrid vehicle (plug-in, PHEV))	AR47.70-P-0002SE
2	Remove screw (1).
3	Unclip high-voltage power distributor (2) and place to one side.
4	Remove screws (3). a
5	Remove electrical lines (4). ' '	Nut, line to windshield heater control unit	*BA54.21-P-1001-01D
6	Take out holder (5) together with windshield heater control unit (N61) until electrical connector (6) is accessible.
7	Disconnect electrical connection (6).
8	Take out holder (5) together with windshield heater control unit (N61).
9	Detach windshield heater control unit (N61) from holder (5).	When replacing windshield heater control unit (N61).
10	Install in the reverse order.